<template>
  <div class="login-container">
    <el-row>
      <el-col :span="12" :xs="0"></el-col>
      <el-col :span="12" :xs="24">
        <el-form
          class="login-form"
          :model="loginForm"
          :rules="rules"
          ref="loginForms"
        >
          <h1>Hello</h1>
          <h2>欢迎来到蚂蚁看看</h2>
          <el-form-item prop="username">
            <el-input
              :prefix-icon="User"
              v-model="loginForm.username"
            ></el-input>
          </el-form-item>
          <el-form-item prop="password">
            <el-input
              type="password"
              :prefix-icon="Lock"
              v-model="loginForm.password"
              show-password
            ></el-input>
          </el-form-item>
          <el-form-item>
            <el-button
              :loading="loading"
              class="login-btn"
              type="primary"
              size="default"
              @click="onLogin"
            >
              登录
            </el-button>
          </el-form-item>
        </el-form>
      </el-col>
    </el-row>
  </div>
</template>
<script setup lang="ts">
import { User, Lock } from '@element-plus/icons-vue'
import { reactive, ref } from 'vue'
import { useRouter, useRoute } from 'vue-router'
// 引入用户相关的小仓库
import useUserStore from '@/store/modules/user.ts'
import { ElNotification } from 'element-plus'
// 引入获取当前时间的函数
import { getTime } from '@/utils/time.ts'

let useStore = useUserStore()
// 获取路由
let $router = useRouter()
// 获取路由对象
let $route = useRoute()
// 获取el-form组件
let loginForms = ref()
// 定义变量控制按钮加载效果
let loading = ref(false)
// 收集账号与密码数据
let loginForm = reactive({
  username: 'admin',
  password: 'atguigu123',
})
// 点击登录
const onLogin = async () => {
  // 保证全部表单校验通过再发请求
  await loginForms.value.validate()
  loading.value = true
  try {
    await useStore.userLogin(loginForm)
    // 判断url中是否有query参数
    let redirect = $route.query.redirect
    await $router.push({ path: redirect || '/' })
    ElNotification({
      type: 'success',
      message: '欢迎回来',
      title: `Hi,${getTime()}好`,
    })
    loading.value = false
  } catch (error) {
    loading.value = false
    ElNotification({
      type: 'error',
      message: (error as Error).message,
    })
  }
}
// 自定义校验规则函数
const validatorUserName = (rule: any, value: string, callback: any) => {
  // rule:即为校验规则对象
  // value:即为表单元素文本内容
  if (value.length >= 5) {
    callback()
  } else {
    callback(new Error('账号长度最少六位数'))
  }
}
const validatorPassword = (rule: any, value: string, callback: any) => {
  if (value.length >= 5) {
    callback()
  } else {
    callback(new Error('密码长度最少六位数'))
  }
}
// 定义表单校验需要配置
const rules = {
  username: [
    {
      trigger: 'change',
      validator: validatorUserName,
    },
  ],
  password: [
    {
      trigger: 'change',
      validator: validatorPassword,
    },
  ],
}
</script>
<style scoped lang="scss">
.login-container {
  width: 100%;
  height: 100vh;
  background: url('@/assets/images/background.jpg') no-repeat;
  background-size: cover;

  .login-form {
    position: relative;
    width: 80%;
    top: 30vh;
    background: url('@/assets/images/login_form.png') no-repeat;
    background-size: cover;
    padding: 40px;

    h1 {
      color: white;
      font-size: 40px;
    }

    h2 {
      font-size: 20px;
      color: white;
      margin: 20px 0;
    }

    .login-btn {
      width: 100%;
    }
  }
}
</style>
